A wireshark security update has been released for Debian GNU/Linux 9 LTS to address multiple vulnerabilities.

DSA 5019-1: wireshark security update

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Debian Security Advisory DSA-5019-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
December 10, 2021   https://www.debian.org/security/faq
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Package : wireshark
CVE ID : CVE-2021-22207 CVE-2021-22222 CVE-2021-22235 CVE-2021-39920
CVE-2021-39921 CVE-2021-39922 CVE-2021-39923 CVE-2021-39924
CVE-2021-39925 CVE-2021-39926 CVE-2021-39928 CVE-2021-39929

Multiple vulnerabilities have been discovered in Wireshark, a network
protocol analyzer which could result in denial of service or the execution of
arbitrary code.

For the oldstable distribution (buster), CVE-2021-39925 has been fixed in
in version 2.6.20-0+deb10u2.

For the stable distribution (bullseye), these problems have been fixed in
version 3.4.10-0+deb11u1.

We recommend that you upgrade your wireshark packages.

For the detailed security status of wireshark please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/wireshark

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/